include/linux/socket.h - kernel/msm-4.19 - Gitiles

 #ifndef _LINUX_SOCKET_H
 #define _LINUX_SOCKET_H

 /*
  * Desired design of maximum size and alignment (see RFC2553)
  */
 #define _K_SS_MAXSIZE	128	/* Implementation specific max size */
 #define _K_SS_ALIGNSIZE	(__alignof__ (struct sockaddr *))
 				/* Implementation specific desired alignment */

 struct __kernel_sockaddr_storage {
 	unsigned short	ss_family;		/* address family */
 	/* Following field(s) are implementation specific */
 	char		__data[_K_SS_MAXSIZE - sizeof(unsigned short)];
 				/* space to achieve desired size, */
 				/* _SS_MAXSIZE value minus size of ss_family */
 } __attribute__ ((aligned(_K_SS_ALIGNSIZE)));	/* force desired alignment */

 #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)

 #include <asm/socket.h>			/* arch-dependent defines	*/
 #include <linux/sockios.h>		/* the SIOCxxx I/O controls	*/
 #include <linux/uio.h>			/* iovec support		*/
 #include <linux/types.h>		/* pid_t			*/
 #include <linux/compiler.h>		/* __user			*/

 extern int sysctl_somaxconn;
 #ifdef CONFIG_PROC_FS
 struct seq_file;
 extern void socket_seq_show(struct seq_file *seq);
 #endif

 typedef unsigned short	sa_family_t;

 /*
  *	1003.1g requires sa_family_t and that sa_data is char.
  */

 struct sockaddr {
 	sa_family_t	sa_family;	/* address family, AF_xxx	*/
 	char		sa_data[14];	/* 14 bytes of protocol address	*/
 };

 struct linger {
 	int		l_onoff;	/* Linger active		*/
 	int		l_linger;	/* How long to linger for	*/
 };

 #define sockaddr_storage __kernel_sockaddr_storage

 /*
  *	As we do 4.4BSD message passing we use a 4.4BSD message passing
  *	system, not 4.3. Thus msg_accrights(len) are now missing. They
  *	belong in an obscure libc emulation or the bin.
  */

 struct msghdr {
 	void	*	msg_name;	/* Socket name			*/
 	int		msg_namelen;	/* Length of name		*/
 	struct iovec *	msg_iov;	/* Data blocks			*/
 	__kernel_size_t	msg_iovlen;	/* Number of blocks		*/
 	void 	*	msg_control;	/* Per protocol magic (eg BSD file descriptor passing) */
 	__kernel_size_t	msg_controllen;	/* Length of cmsg list */
 	unsigned	msg_flags;
 };

 /*
  *	POSIX 1003.1g - ancillary data object information
  *	Ancillary data consits of a sequence of pairs of
  *	(cmsghdr, cmsg_data[])
  */

 struct cmsghdr {
 	__kernel_size_t	cmsg_len;	/* data byte count, including hdr */
         int		cmsg_level;	/* originating protocol */
         int		cmsg_type;	/* protocol-specific type */
 };

 /*
  *	Ancilliary data object information MACROS
  *	Table 5-14 of POSIX 1003.1g
  */

 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))

 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )

 #define CMSG_DATA(cmsg)	((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))

 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
 				  (struct cmsghdr *)(ctl) : \
 				  (struct cmsghdr *)NULL)
 #define CMSG_FIRSTHDR(msg)	__CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
 			     (cmsg)->cmsg_len <= (unsigned long) \
 			     ((mhdr)->msg_controllen - \
 			      ((char *)(cmsg) - (char *)(mhdr)->msg_control)))

 /*
  *	This mess will go away with glibc
  */

 #ifdef __KERNEL__
 #define __KINLINE static inline
 #elif  defined(__GNUC__)
 #define __KINLINE static __inline__
 #elif defined(__cplusplus)
 #define __KINLINE static inline
 #else
 #define __KINLINE static
 #endif


 /*
  *	Get the next cmsg header
  *
  *	PLEASE, do not touch this function. If you think, that it is
  *	incorrect, grep kernel sources and think about consequences
  *	before trying to improve it.
  *
  *	Now it always returns valid, not truncated ancillary object
  *	HEADER. But caller still MUST check, that cmsg->cmsg_len is
  *	inside range, given by msg->msg_controllen before using
  *	ancillary object DATA.				--ANK (980731)
  */

 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
 					       struct cmsghdr *__cmsg)
 {
 	struct cmsghdr * __ptr;

 	__ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) +  CMSG_ALIGN(__cmsg->cmsg_len));
 	if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
 		return (struct cmsghdr *)0;

 	return __ptr;
 }

 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
 {
 	return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
 }

 /* "Socket"-level control message types: */

 #define	SCM_RIGHTS	0x01		/* rw: access rights (array of int) */
 #define SCM_CREDENTIALS 0x02		/* rw: struct ucred		*/
 #define SCM_SECURITY	0x03		/* rw: security label		*/

 struct ucred {
 	__u32	pid;
 	__u32	uid;
 	__u32	gid;
 };

 /* Supported address families. */
 #define AF_UNSPEC	0
 #define AF_UNIX		1	/* Unix domain sockets 		*/
 #define AF_LOCAL	1	/* POSIX name for AF_UNIX	*/
 #define AF_INET		2	/* Internet IP Protocol 	*/
 #define AF_AX25		3	/* Amateur Radio AX.25 		*/
 #define AF_IPX		4	/* Novell IPX 			*/
 #define AF_APPLETALK	5	/* AppleTalk DDP 		*/
 #define AF_NETROM	6	/* Amateur Radio NET/ROM 	*/
 #define AF_BRIDGE	7	/* Multiprotocol bridge 	*/
 #define AF_ATMPVC	8	/* ATM PVCs			*/
 #define AF_X25		9	/* Reserved for X.25 project 	*/
 #define AF_INET6	10	/* IP version 6			*/
 #define AF_ROSE		11	/* Amateur Radio X.25 PLP	*/
 #define AF_DECnet	12	/* Reserved for DECnet project	*/
 #define AF_NETBEUI	13	/* Reserved for 802.2LLC project*/
 #define AF_SECURITY	14	/* Security callback pseudo AF */
 #define AF_KEY		15      /* PF_KEY key management API */
 #define AF_NETLINK	16
 #define AF_ROUTE	AF_NETLINK /* Alias to emulate 4.4BSD */
 #define AF_PACKET	17	/* Packet family		*/
 #define AF_ASH		18	/* Ash				*/
 #define AF_ECONET	19	/* Acorn Econet			*/
 #define AF_ATMSVC	20	/* ATM SVCs			*/
 #define AF_SNA		22	/* Linux SNA Project (nutters!) */
 #define AF_IRDA		23	/* IRDA sockets			*/
 #define AF_PPPOX	24	/* PPPoX sockets		*/
 #define AF_WANPIPE	25	/* Wanpipe API Sockets */
 #define AF_LLC		26	/* Linux LLC			*/
 #define AF_TIPC		30	/* TIPC sockets			*/
 #define AF_BLUETOOTH	31	/* Bluetooth sockets 		*/
 #define AF_IUCV		32	/* IUCV sockets			*/
 #define AF_MAX		33	/* For now.. */

 /* Protocol families, same as address families. */
 #define PF_UNSPEC	AF_UNSPEC
 #define PF_UNIX		AF_UNIX
 #define PF_LOCAL	AF_LOCAL
 #define PF_INET		AF_INET
 #define PF_AX25		AF_AX25
 #define PF_IPX		AF_IPX
 #define PF_APPLETALK	AF_APPLETALK
 #define	PF_NETROM	AF_NETROM
 #define PF_BRIDGE	AF_BRIDGE
 #define PF_ATMPVC	AF_ATMPVC
 #define PF_X25		AF_X25
 #define PF_INET6	AF_INET6
 #define PF_ROSE		AF_ROSE
 #define PF_DECnet	AF_DECnet
 #define PF_NETBEUI	AF_NETBEUI
 #define PF_SECURITY	AF_SECURITY
 #define PF_KEY		AF_KEY
 #define PF_NETLINK	AF_NETLINK
 #define PF_ROUTE	AF_ROUTE
 #define PF_PACKET	AF_PACKET
 #define PF_ASH		AF_ASH
 #define PF_ECONET	AF_ECONET
 #define PF_ATMSVC	AF_ATMSVC
 #define PF_SNA		AF_SNA
 #define PF_IRDA		AF_IRDA
 #define PF_PPPOX	AF_PPPOX
 #define PF_WANPIPE	AF_WANPIPE
 #define PF_LLC		AF_LLC
 #define PF_TIPC		AF_TIPC
 #define PF_BLUETOOTH	AF_BLUETOOTH
 #define PF_IUCV		AF_IUCV
 #define PF_MAX		AF_MAX

 /* Maximum queue length specifiable by listen.  */
 #define SOMAXCONN	128

 /* Flags we can use with send/ and recv.
    Added those for 1003.1g not all are supported yet
  */

 #define MSG_OOB		1
 #define MSG_PEEK	2
 #define MSG_DONTROUTE	4
 #define MSG_TRYHARD     4       /* Synonym for MSG_DONTROUTE for DECnet */
 #define MSG_CTRUNC	8
 #define MSG_PROBE	0x10	/* Do not send. Only probe path f.e. for MTU */
 #define MSG_TRUNC	0x20
 #define MSG_DONTWAIT	0x40	/* Nonblocking io		 */
 #define MSG_EOR         0x80	/* End of record */
 #define MSG_WAITALL	0x100	/* Wait for a full request */
 #define MSG_FIN         0x200
 #define MSG_SYN		0x400
 #define MSG_CONFIRM	0x800	/* Confirm path validity */
 #define MSG_RST		0x1000
 #define MSG_ERRQUEUE	0x2000	/* Fetch message from error queue */
 #define MSG_NOSIGNAL	0x4000	/* Do not generate SIGPIPE */
 #define MSG_MORE	0x8000	/* Sender will send more */

 #define MSG_EOF         MSG_FIN

 #if defined(CONFIG_COMPAT)
 #define MSG_CMSG_COMPAT	0x80000000	/* This message needs 32 bit fixups */
 #else
 #define MSG_CMSG_COMPAT	0		/* We never have 32 bit fixups */
 #endif


 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 #define SOL_IP		0
 /* #define SOL_ICMP	1	No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
 #define SOL_TCP		6
 #define SOL_UDP		17
 #define SOL_IPV6	41
 #define SOL_ICMPV6	58
 #define SOL_SCTP	132
 #define SOL_UDPLITE	136     /* UDP-Lite (RFC 3828) */
 #define SOL_RAW		255
 #define SOL_IPX		256
 #define SOL_AX25	257
 #define SOL_ATALK	258
 #define SOL_NETROM	259
 #define SOL_ROSE	260
 #define SOL_DECNET	261
 #define	SOL_X25		262
 #define SOL_PACKET	263
 #define SOL_ATM		264	/* ATM layer (cell level) */
 #define SOL_AAL		265	/* ATM Adaption Layer (packet level) */
 #define SOL_IRDA        266
 #define SOL_NETBEUI	267
 #define SOL_LLC		268
 #define SOL_DCCP	269
 #define SOL_NETLINK	270
 #define SOL_TIPC	271

 /* IPX options */
 #define IPX_TYPE	1

 #ifdef __KERNEL__
 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
 				int offset, int len);
 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
 					  struct iovec *iov,
 					  int offset,
 					  unsigned int len, __wsum *csump);

 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
 extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen);
 extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr);
 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);

 #endif
 #endif /* not kernel and not glibc */
 #endif /* _LINUX_SOCKET_H */
	#ifndef _LINUX_SOCKET_H
	#define _LINUX_SOCKET_H

	/*
	* Desired design of maximum size and alignment (see RFC2553)
	*/
	#define _K_SS_MAXSIZE 128 /* Implementation specific max size */
	#define _K_SS_ALIGNSIZE (__alignof__ (struct sockaddr *))
	/* Implementation specific desired alignment */

	struct __kernel_sockaddr_storage {
	unsigned short ss_family; /* address family */
	/* Following field(s) are implementation specific */
	char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
	/* space to achieve desired size, */
	/* _SS_MAXSIZE value minus size of ss_family */
	} __attribute__ ((aligned(_K_SS_ALIGNSIZE))); /* force desired alignment */

	#if defined(__KERNEL__) \|\| !defined(__GLIBC__) \|\| (__GLIBC__ < 2)

	#include <asm/socket.h> /* arch-dependent defines */
	#include <linux/sockios.h> /* the SIOCxxx I/O controls */
	#include <linux/uio.h> /* iovec support */
	#include <linux/types.h> /* pid_t */
	#include <linux/compiler.h> /* __user */

	extern int sysctl_somaxconn;
	#ifdef CONFIG_PROC_FS
	struct seq_file;
	extern void socket_seq_show(struct seq_file *seq);
	#endif

	typedef unsigned short sa_family_t;

	/*
	* 1003.1g requires sa_family_t and that sa_data is char.
	*/

	struct sockaddr {
	sa_family_t sa_family; /* address family, AF_xxx */
	char sa_data[14]; /* 14 bytes of protocol address */
	};

	struct linger {
	int l_onoff; /* Linger active */
	int l_linger; /* How long to linger for */
	};

	#define sockaddr_storage __kernel_sockaddr_storage

	/*
	* As we do 4.4BSD message passing we use a 4.4BSD message passing
	* system, not 4.3. Thus msg_accrights(len) are now missing. They
	* belong in an obscure libc emulation or the bin.
	*/

	struct msghdr {
	void * msg_name; /* Socket name */
	int msg_namelen; /* Length of name */
	struct iovec * msg_iov; /* Data blocks */
	__kernel_size_t msg_iovlen; /* Number of blocks */
	void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
	__kernel_size_t msg_controllen; /* Length of cmsg list */
	unsigned msg_flags;
	};

	/*
	* POSIX 1003.1g - ancillary data object information
	* Ancillary data consits of a sequence of pairs of
	* (cmsghdr, cmsg_data[])
	*/

	struct cmsghdr {
	__kernel_size_t cmsg_len; /* data byte count, including hdr */
	int cmsg_level; /* originating protocol */
	int cmsg_type; /* protocol-specific type */
	};

	/*
	* Ancilliary data object information MACROS
	* Table 5-14 of POSIX 1003.1g
	*/

	#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
	#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))

	#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )

	#define CMSG_DATA(cmsg) ((void )((char )(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
	#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
	#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))

	#define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
	(struct cmsghdr *)(ctl) : \
	(struct cmsghdr *)NULL)
	#define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
	#define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
	(cmsg)->cmsg_len <= (unsigned long) \
	((mhdr)->msg_controllen - \
	((char )(cmsg) - (char )(mhdr)->msg_control)))

	/*
	* This mess will go away with glibc
	*/

	#ifdef __KERNEL__
	#define __KINLINE static inline
	#elif defined(__GNUC__)
	#define __KINLINE static __inline__
	#elif defined(__cplusplus)
	#define __KINLINE static inline
	#else
	#define __KINLINE static
	#endif


	/*
	* Get the next cmsg header
	*
	* PLEASE, do not touch this function. If you think, that it is
	* incorrect, grep kernel sources and think about consequences
	* before trying to improve it.
	*
	* Now it always returns valid, not truncated ancillary object
	* HEADER. But caller still MUST check, that cmsg->cmsg_len is
	* inside range, given by msg->msg_controllen before using
	* ancillary object DATA. --ANK (980731)
	*/

	__KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
	struct cmsghdr *__cmsg)
	{
	struct cmsghdr * __ptr;

	__ptr = (struct cmsghdr)(((unsigned char ) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
	if ((unsigned long)((char)(__ptr+1) - (char ) __ctl) > __size)
	return (struct cmsghdr *)0;

	return __ptr;
	}

	__KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr __msg, struct cmsghdr __cmsg)
	{
	return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
	}

	/* "Socket"-level control message types: */

	#define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
	#define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
	#define SCM_SECURITY 0x03 /* rw: security label */

	struct ucred {
	__u32 pid;
	__u32 uid;
	__u32 gid;
	};

	/* Supported address families. */
	#define AF_UNSPEC 0
	#define AF_UNIX 1 /* Unix domain sockets */
	#define AF_LOCAL 1 /* POSIX name for AF_UNIX */
	#define AF_INET 2 /* Internet IP Protocol */
	#define AF_AX25 3 /* Amateur Radio AX.25 */
	#define AF_IPX 4 /* Novell IPX */
	#define AF_APPLETALK 5 /* AppleTalk DDP */
	#define AF_NETROM 6 /* Amateur Radio NET/ROM */
	#define AF_BRIDGE 7 /* Multiprotocol bridge */
	#define AF_ATMPVC 8 /* ATM PVCs */
	#define AF_X25 9 /* Reserved for X.25 project */
	#define AF_INET6 10 /* IP version 6 */
	#define AF_ROSE 11 /* Amateur Radio X.25 PLP */
	#define AF_DECnet 12 /* Reserved for DECnet project */
	#define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
	#define AF_SECURITY 14 /* Security callback pseudo AF */
	#define AF_KEY 15 /* PF_KEY key management API */
	#define AF_NETLINK 16
	#define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
	#define AF_PACKET 17 /* Packet family */
	#define AF_ASH 18 /* Ash */
	#define AF_ECONET 19 /* Acorn Econet */
	#define AF_ATMSVC 20 /* ATM SVCs */
	#define AF_SNA 22 /* Linux SNA Project (nutters!) */
	#define AF_IRDA 23 /* IRDA sockets */
	#define AF_PPPOX 24 /* PPPoX sockets */
	#define AF_WANPIPE 25 /* Wanpipe API Sockets */
	#define AF_LLC 26 /* Linux LLC */
	#define AF_TIPC 30 /* TIPC sockets */
	#define AF_BLUETOOTH 31 /* Bluetooth sockets */
	#define AF_IUCV 32 /* IUCV sockets */
	#define AF_MAX 33 /* For now.. */

	/* Protocol families, same as address families. */
	#define PF_UNSPEC AF_UNSPEC
	#define PF_UNIX AF_UNIX
	#define PF_LOCAL AF_LOCAL
	#define PF_INET AF_INET
	#define PF_AX25 AF_AX25
	#define PF_IPX AF_IPX
	#define PF_APPLETALK AF_APPLETALK
	#define PF_NETROM AF_NETROM
	#define PF_BRIDGE AF_BRIDGE
	#define PF_ATMPVC AF_ATMPVC
	#define PF_X25 AF_X25
	#define PF_INET6 AF_INET6
	#define PF_ROSE AF_ROSE
	#define PF_DECnet AF_DECnet
	#define PF_NETBEUI AF_NETBEUI
	#define PF_SECURITY AF_SECURITY
	#define PF_KEY AF_KEY
	#define PF_NETLINK AF_NETLINK
	#define PF_ROUTE AF_ROUTE
	#define PF_PACKET AF_PACKET
	#define PF_ASH AF_ASH
	#define PF_ECONET AF_ECONET
	#define PF_ATMSVC AF_ATMSVC
	#define PF_SNA AF_SNA
	#define PF_IRDA AF_IRDA
	#define PF_PPPOX AF_PPPOX
	#define PF_WANPIPE AF_WANPIPE
	#define PF_LLC AF_LLC
	#define PF_TIPC AF_TIPC
	#define PF_BLUETOOTH AF_BLUETOOTH
	#define PF_IUCV AF_IUCV
	#define PF_MAX AF_MAX

	/* Maximum queue length specifiable by listen. */
	#define SOMAXCONN 128

	/* Flags we can use with send/ and recv.
	Added those for 1003.1g not all are supported yet
	*/

	#define MSG_OOB 1
	#define MSG_PEEK 2
	#define MSG_DONTROUTE 4
	#define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
	#define MSG_CTRUNC 8
	#define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
	#define MSG_TRUNC 0x20
	#define MSG_DONTWAIT 0x40 /* Nonblocking io */
	#define MSG_EOR 0x80 /* End of record */
	#define MSG_WAITALL 0x100 /* Wait for a full request */
	#define MSG_FIN 0x200
	#define MSG_SYN 0x400
	#define MSG_CONFIRM 0x800 /* Confirm path validity */
	#define MSG_RST 0x1000
	#define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
	#define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
	#define MSG_MORE 0x8000 /* Sender will send more */

	#define MSG_EOF MSG_FIN

	#if defined(CONFIG_COMPAT)
	#define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
	#else
	#define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
	#endif


	/* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
	#define SOL_IP 0
	/* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
	#define SOL_TCP 6
	#define SOL_UDP 17
	#define SOL_IPV6 41
	#define SOL_ICMPV6 58
	#define SOL_SCTP 132
	#define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
	#define SOL_RAW 255
	#define SOL_IPX 256
	#define SOL_AX25 257
	#define SOL_ATALK 258
	#define SOL_NETROM 259
	#define SOL_ROSE 260
	#define SOL_DECNET 261
	#define SOL_X25 262
	#define SOL_PACKET 263
	#define SOL_ATM 264 /* ATM layer (cell level) */
	#define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
	#define SOL_IRDA 266
	#define SOL_NETBEUI 267
	#define SOL_LLC 268
	#define SOL_DCCP 269
	#define SOL_NETLINK 270
	#define SOL_TIPC 271

	/* IPX options */
	#define IPX_TYPE 1

	#ifdef __KERNEL__
	extern int memcpy_fromiovec(unsigned char kdata, struct iovec iov, int len);
	extern int memcpy_fromiovecend(unsigned char kdata, struct iovec iov,
	int offset, int len);
	extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
	struct iovec *iov,
	int offset,
	unsigned int len, __wsum *csump);

	extern int verify_iovec(struct msghdr m, struct iovec iov, char *address, int mode);
	extern int memcpy_toiovec(struct iovec v, unsigned char kdata, int len);
	extern int move_addr_to_user(void kaddr, int klen, void __user uaddr, int __user *ulen);
	extern int move_addr_to_kernel(void __user uaddr, int ulen, void kaddr);
	extern int put_cmsg(struct msghdr, int level, int type, int len, void data);

	#endif
	#endif /* not kernel and not glibc */
	#endif /* _LINUX_SOCKET_H */